<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>数据热的图-动画效果</title>
    <style>
        body {
            background-color: #333;
        }

        .map {
            position: relative;
            margin: 0 auto;
            width: 747px;
            height: 616px;
            background: url("../img/map.png") no-repeat;
        }

        .city {
            position: absolute;
            top: 227px;
            right: 193px;
        }

        .tb {
            top: 500px;
            right: 80px;
        }

        .dotted {
            width: 8px;
            height: 8px;
            background-color: #09f;
            border-radius: 50%;
        }

        .city div[class^='pulse'] {
            /*保证盒子水平垂直居中*/
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 8px;
            height: 8px;
            box-shadow: 0 0 12px #009ded;
            border-radius: 50%;
            animation: pulse 1.2s linear infinite;
        }

        /*定位这么长是因为权重*/
        .city div.pulse2 {
            animation-delay: 0.4s;
        }

        .city div.pulse3 {
            animation-delay: 0.8s;
        }

        @keyframes pulse {
            0% {
            }
            70% {
                width: 40px;
                height: 40px;
                opacity: 1;
            }
            70% {
                width: 70px;
                height: 70px;
                opacity: 0;
            }
        }

    </style>
</head>
<body>
<div class="map">
    <div class="city">
        <div class="dotted"></div>
        <div class="pulse1"></div>
        <div class="pulse2"></div>
        <div class="pulse3"></div>
    </div>
    <div class="city tb">
        <div class="dotted"></div>
        <div class="pulse1"></div>
        <div class="pulse2"></div>
        <div class="pulse3"></div>
    </div>
</div>
</body>
</html>